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Extang Tuff Tonno Tonneau Cover 14665

Product Information
List Price:
Our Price:
4.3 (1 review)
Part #:
2004-2012 Chevy Colorado, 6'1" Bed
2004-2012 GMC Canyon, 6'1" Bed
2006-2008 Isuzu I-Series, 6'1" Bed


  • Snapless Peel & Seal fastening system
  • Allows for quick access at all four corners of cover
  • Cover can be rolled up and bars removed for hauling large items
  • Short bed features 3 monster bows & a long bed has 4
  • Cover tension can be adjusted by bow height and rear rail tensioner
  • No drill installation with clamps
  • Made in the USA - Ann Arbor, MI

Measure Your Truck Bed for a Tonneau Cover

Does your truck have a track system?

Are you looking to smooth out your truck's performance while adding style and function? Great! The Extang Tuff Tonno is here to assist you in doing that. This amazing tonno gives you unmatched style, improves aerodynamics, and protects expensive tools.

They are made out of durable vinyl that was specially designed to withstand harsh conditions including the sun's harmful UV rays, extremely cold temperatures as well as rain, snow and sleet. The tarp rolls onto 3 or 4 huge spring loaded monster bows that are made durable and will last the test of time.

The Extang Tuff Tonno easily clamps to the bed rails of your truck using the Tuff Klamp system. This truck bed cover is seamlessly shut using the tight fitting seal & peel system, keeping unwanted moisture and debris from harming your truck bed as well as expensive cargo. In addition, the exclusive tail rail helps tighten your tarp to the optimal tension desired.

You get it all when purchasing an Extang Tuff Tonno from RealTruck!

Manufactured by Extang, a Truck Hero company.

More Information

PDF Icon Extang Tuff Tonno Brochure

Order Notes

The cargo management, utili-track, or deck rail system options refer to the factory installed rail system designed to hold moveable cargo cleats along the inside of your truck bed. Please call us for further clarification.

View Available Part Numbers For This Product Line

Frequently Asked Questions

Will they work with bed liners?
Yes, but there are a few simple additional steps that need to take place to make them compatible. If you own an under the rail liner, you need a couple small rubber shims to assist the lifting of the tonneau over the tailgate protector. Over the rail bed liners need to be notched out in order for the tonneau clamps to go through.
Will I be able to open and close my tailgate?
YES, there is no restriction caused by the tonneau.
What can I clean my Tuff Tonno with?
We recommend using soapy water with a medium bristle brush. Extang also makes a tonno cleaner that is ideal for the cleansing process.


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Extang Tuff Tonneau Cover Fast Facts
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Extang Tuff Tonneau Cover Unboxing


Product Reviews Summary

Price / Value
Ease of Installation
1  Customer Review
5 Star
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Pretty darn good Tonneau for the money
Part #: EXT-14665 Posted on
Was this review helpful?
- 2005 Chevy Colorado (Rockwell, IA)
Price / Value
Ease of Installation
I ordered this Tonneau for my 05 Colorado. I was a bit hesitant about the "J" channel but I had seen so many Velcro covers flopping in the wind. More on the "J" channel later. The two things that drew me to this particular tonneau was the price and the arched bows. After using the tonneau, I like the arched bows as water tuns off instead of pooling. The bows are easily removed if the need arises.

Installation was as advertized. It was a bit cool when I did my installation and no sun to warm the tonneau so the first time getting the touneau fastened down was a bit of a pain. Other than the cool weather the installation went well. It took me about 25 minutes to complete.

I have since the installation pealed the tonneau back several times and found that getting the "J" channel to hook up is not an issue except for the very last inch or two sometimes can be a bit stubborn. Just follow the instructions and it will hook with a little extra pressure. I find the "J" channel to very secure and will not ever use Velcro again.

I had one small issue. The tail piece over the end gate was a bit short. An email to RealTtruck netted a response from RealTruck AND from a factory rep on the issue. A new tail piece was sent and all was fine. It seems like Real Truck and ExTang fell over themselves to make the problem right. I would have to rate the customer service at a 9 out of 10.

As far as the Tonneau is concerned I would give it an 8 out of 10. The ONLY thing I think could be improved is the tension of the tarp from front to rear. BUT... my expectations may be a bit high. I don't see this as a fault, just an area that may be improved in future renditions. I would not let this prevent me from buying a second tonneau.

So in a nutshell. A pretty good cover for the money, DARN good customer service from the factory AND RealTruck and a cover that looks like it will last a long time. A win in anybody's book.


Limited Lifetime Warranty on Frame / 10 Year Warranty on Vinyl

Lifetime Frame: Extang offers a lifetime warranty against defective materials or workmanship on all tonno rails, aluminum components, clamps, bows, hardware.
10 Year Tarp: Extang offers a 10 year warranty against defective materials or workmanship on the vinyl covering. The 10 year warranty coverage is as follows: 
WARRANTY CONDITIONS: This warranty is against defective materials or workmanship. The warranty is void if the product has been damaged by accident, unreasonable use, neglect, improper service/installation/removal, modifications, acts of God, normal wear and tear, or other causes not arising out of defective materials or workmanship. Consequential and incidental damages are not covered under this warranty.


Extang covers can easily be installed at home. Professional installers generally can install an Extang Cover in 10 minutes. The installation are clear cut and easy to read. For additional information, please see the installation below or call 1-877-216-5446 or 701-253-5906.

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How to Install Extang Tuff Tonneau Cover